Multiscale Rupture Modeling: Bridging Laboratory Acoustic Emissions and Earthquake Ground Motions
Description:
Rupture phenomena occur at multiple scales, ranging from laboratory failure experiments to real-world earthquakes. This study introduces a novel hybrid approach combining quasi-static and dynamic rupture modeling to explore the initiation and propagation of fracture events. This method is applied to three distinct scenarios: a laboratory stick-slip experiment, a hydraulic fracture experiment, and the 2022 M6.7 Luding earthquake in Sichuan Province, China.
The models for each scenario are validated using real waveform observations from laboratory Piezoelectric Transducer (PZT) sensors and an array of dense field strong motion stations. The results from these applications demonstrate the robustness and versatility of the hybrid rupture modeling technique. The study provides insights into the intricate mechanisms of fracture initiation and growth at different scales, highlighting the correlation between micro-scale laboratory acoustic emissions and macro-scale earthquake ground motions. Furthermore, our findings reveal the critical role of various physical parameters in rupture dynamics, such as stress concentration, material heterogeneity, and fault geometry. These insights have significant implications for understanding earthquake mechanics and improving seismic hazard assessment.
Session: 3D Wavefield Simulations: From Seismic Imaging to Ground Motion Modelling - II
Type: Oral
Date: 5/2/2024
Presentation Time: 11:00 AM (local time)
Presenting Author: Chen
Student Presenter: No
Invited Presentation:
Authors
Chen Gu Presenting Author Corresponding Author guchch@mit.edu Tsinghua University |
Chunfang Meng cmeng@mit.edu Massachusetts Institute of Technology |
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Multiscale Rupture Modeling: Bridging Laboratory Acoustic Emissions and Earthquake Ground Motions
Category
3D Wavefield Simulations: From Seismic Imaging to Ground Motion Modelling